IEICE Trans

Kazuto OGAWA

Privacy-Preserving System for Enriched-Integrated Service Kaisei KAJITA Go OHTAKE Kazuto OGAWA
Publication: Publication Date: 2021/05/01 Vol. E104-D No. 5 pp. 647-658 Type of Manuscript: Special Section PAPER (Special Section on the Architectures, Protocols, and Applications for the Future Internet) Category: Keyword: privacy preserving, attribute-based keyword search, integrated broadcast-broadband service,
	Summary \| Full Text:PDF(772KB)

A Constant-Size Signature Scheme with a Tighter Reduction from the CDH Assumption Kaisei KAJITA Kazuto OGAWA Eiichiro FUJISAKI
Publication: Publication Date: 2020/01/01 Vol. E103-A No. 1 pp. 141-149 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: digital signature, CDH assumption, trapdoor commitment, tight security reduction,
	Summary \| Full Text:PDF(1MB)

Attribute-Based Encryption for Range Attributes Nuttapong ATTRAPADUNG Goichiro HANAOKA Kazuto OGAWA Go OHTAKE Hajime WATANABE Shota YAMADA
Publication: Publication Date: 2018/09/01 Vol. E101-A No. 9 pp. 1440-1455 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: attribute-based encryption, range attribute, generic construction,
	Summary \| Full Text:PDF(2MB)

FOREWORD Kazuto OGAWA
Publication: Publication Date: 2018/01/01 Vol. E101-A No. 1 pp. 1-2 Type of Manuscript: FOREWORD Category: Keyword:
	Summary \| Full Text:PDF(287.3KB)

Partially Wildcarded Ciphertext-Policy Attribute-Based Encryption and Its Performance Evaluation Go OHTAKE Kazuto OGAWA Goichiro HANAOKA Shota YAMADA Kohei KASAMATSU Takashi YAMAKAWA Hideki IMAI
Publication: Publication Date: 2017/09/01 Vol. E100-A No. 9 pp. 1846-1856 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: attribute-based encryption, ciphertext policy, wildcard,
	Summary \| Full Text:PDF(1.8MB)

How to Make Traitor Tracing Schemes Secure against a Content Comparison Attack in Actual Services Kazuto OGAWA Goichiro HANAOKA Hideki IMAI
Publication: Publication Date: 2017/01/01 Vol. E100-A No. 1 pp. 34-49 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: traitor tracing, collusion attack, content comparison, encoding, watermarking, c-secure code,
	Summary \| Full Text:PDF(857.6KB)

Application Authentication System with Efficiently Updatable Signature Kazuto OGAWA Go OHTAKE
Publication: IEICE TRANSACTIONS on Information and Systems Publication Date: 2016/01/01 Vol. E99-D No. 1 pp. 69-82 Type of Manuscript: Special Section PAPER (Special Section on Enriched Multimedia---Creation of a New Society through Value-added Multimedia Content---) Category: Keyword: hybrid services through broadcasting and communications networks, application authentication, ID-based signature, key-insulated signature,
	Summary \| Full Text:PDF(913.9KB)

Weakened Anonymity of Group Signature and Its Application to Subscription Services Kazuto OGAWA Go OHTAKE Arisa FUJII Goichiro HANAOKA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2014/06/01 Vol. E97-A No. 6 pp. 1240-1258 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: subscription service, anonymity, linkability, unlinkability, group signature,
	Summary \| Full Text:PDF(1.2MB)

Secure Broadcast System with Simultaneous Individual Messaging Arisa FUJII Go OHTAKE Goichiro HANAOKA Nuttapong ATTRAPADUNG Hajime WATANABE Kazuto OGAWA Hideki IMAI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2011/06/01 Vol. E94-A No. 6 pp. 1328-1337 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: digital broadcasting, copyright protection, Conditional Access System (CAS), broadcast encryption,
	Summary \| Full Text:PDF(729.8KB)

Efficient Provider Authentication for Bidirectional Broadcasting Service Go OHTAKE Goichiro HANAOKA Kazuto OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2010/06/01 Vol. E93-A No. 6 pp. 1039-1051 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Cryptography and Information Security Keyword: bidirectional broadcasting service, provider authentication, personal information protection, key leakage, strong key-insulated signature,
	Summary \| Full Text:PDF(792.7KB)

A Trade-off Traitor Tracing Scheme Go OHTAKE Kazuto OGAWA Goichiro HANAOKA Hideki IMAI
Publication: IEICE TRANSACTIONS on Information and Systems Publication Date: 2009/05/01 Vol. E92-D No. 5 pp. 859-875 Type of Manuscript: Special Section PAPER (Special Section on Information and Communication System Security) Category: Contents Protection Keyword: dynamic traitor tracing, watermarking, digital rights management, content distribution,
	Summary \| Full Text:PDF(786.3KB)

An Efficient 2-Secure and Short Random Fingerprint Code and Its Security Evaluation Koji NUIDA Satoshi FUJITSU Manabu HAGIWARA Hideki IMAI Takashi KITAGAWA Kazuto OGAWA Hajime WATANABE
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2009/01/01 Vol. E92-A No. 1 pp. 197-206 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Application Keyword: fingerprint, c-secure code, collusion attack, security analysis, watermark, DRM,
	Summary \| Full Text:PDF(528.7KB)

Extension of Broadcasting Service by Using Electronic Tokens Kazuto OGAWA Goichiro HANAOKA Hideki IMAI
Publication: IEICE TRANSACTIONS on Information and Systems Publication Date: 2007/11/01 Vol. E90-D No. 11 pp. 1741-1750 Type of Manuscript: PAPER Category: Contents Technology and Web Information Systems Keyword: content distribution, token, anonymity, group signature, privacy preservation,
	Summary \| Full Text:PDF(470.5KB)

Traitor Tracing Scheme Secure against Adaptive Key Exposure and its Application to Anywhere TV Service Kazuto OGAWA Goichiro HANAOKA Hideki IMAI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2007/05/01 Vol. E90-A No. 5 pp. 1000-1011 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: traitor tracing, key exposure, key update, two variable-polynomial,
	Summary \| Full Text:PDF(547.8KB)

Managing Encryption and Key Publication Independently in Digital Rights Management Systems Goichiro HANAOKA Kazuto OGAWA Itsuro MUROTA Go OHTAKE Keigo MAJIMA Seiichi GOHSHI Kimiyuki OYAMADA Seiichi NAMBA Hideki IMAI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2004/01/01 Vol. E87-A No. 1 pp. 160-172 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Applications Keyword: digital rights management systems, copyright protection, semantic security, adaptive attacks,
	Summary \| Full Text:PDF(407.4KB)